Means for repairing fractured castings



June 15, 1943. L. B. scoTT MEANS FOR REPAIRING FRACTURED CASTINGS Filed Nov. 28, 1940 3 woe/rm L aq/newce 5. 500 ff ture.

Patented-lun 1.943 a I MEANS FOR REPAIRING mc'rurmn cas'rmos Lawrence B. Scott, Houston, Tex.

Application November 28, 1940, Serial No. 367,540 Claims. (Cl 189 36) This invention relates to new and useful im-.

provements in methods and means for repairing fractured castings and structures of a similar na- I have disclosed in my Patent No. 2,195,741, issued April 2, 1940, and in my pending application, Serial No. 259,594, filed March 3, 1939, various methods and means of repairing cracked or fractured castings or structures of a similar nature. It has been found, that it is desirable to provide means for expanding the locks which are used as said locks are forced into position within the casting.

It is, therefore, one object of this inventionto provide an improved method and means for repairing damaged castings, or articles of a similar nature, wherein the locking member is expanded as it is forced into position in the casting.

Another object of the invention isto provide a locking member of such configuration as to materially increase the efficiency of said member under various conditions.

, Still another object of the invention is-to provide an improved method and means of repairing damaged castings, or articles of al similar nature, whereby corners, edges. and angular projections on said castings may be repaired.

A construction designed to carry out the in,- vention will be hereinafter described, together with other features of the invention.

The invention will be mor readily understood from a reading of the following specification and by reference to the accompanying drawing, in which an example of the invention is shown, and wherein:

Figure l is a plan view of a locking member, constructed in accordance with the invention,

casting,

Figure 2 is a vertical, longitudinal, sectional view taken on the line 22 of Figure 1,

Figure 3 is a plan view of another form of the locking member,

Figure 4 is a vertical. transverse, sectional view taken on the line i4 of Figure 3,

- and showing the locking member in position in a Figure 5 is an enlarged, vertical, cross-section a1 view showing one of the locking members 1 position within a casting,

Figure 6 is an isometric view of a further modification of the locking member showing the member in position upon a corner or an edge of a casting,

Figure 7 is a longitudinal, sectional .view of the locking member shown in Figure 6, and

Figure-8 is a transverse, sectional view of the fractured member;

damaged structures is particularly applicable to V lbcking member shown in Figure 6 of the, draw-' ing.

Inthe drawing, the numerallil designates a This method of repairing metallic castings or similar articles of a relatively frangible nature, however, the invention may be utilized to repair many different types of structures or to strengthen said structures at. points of stress.

In carrying out theteachings of this invention,

a plurality of elongate recesses it are formed in the face of the fractured member in such a position as to extend transversely of the fracture H which appears in Figures 1 and 2 of the drawing. It is pointed out, that the recesses may be formed in any suitable or desirable position with respect to the member in or the fracture M. The recesses have been shown in the drawing as extending transversely of the fracture only for reasons of illustration. The recesses may be placed longitudinally with respect to the fracture or at an angle thereto. Each individual member is subject to stresses of varying magni tudes and directions. For this reason, each in-' best adapted to that particular member, and

therefore the positionoccupied by the recesses l i is determined by the configuration of the fractured member and the stresses said member is subjected to.

The recesses I i are of such a shape a to receive locking members .83. The members 53, as shown a in Figures 1 and 2, are elongateand are provided with laterally extending, semi-circular lugs It. The lugs 94 are formed in pairs along the length of the member so as to have one lug of a pair directly opposite the other. Any suitable num'-*. ber of lugs may be utilized since the members may be of any desirable length, and any suitable spacing of said lugs may be employed. It is not necessary for the lugs to be formed in transverse pairs, however, such a configuration has been found to be particularly eflicient. J M I A plurality of vertical openings l5 are formed along the longitudinal axis of each of the locking members l3. The openings l5 are so spaced along the members l3 so as to have one opening between each of the pairs of lugs i4. Such a of said openings.

.spacing is not essential to the invention but is pointed out that the pins I6, as they are inserted into the openings l5, extend a short distance below the under side of the locking members. With the membersv 13 in this position, a suitable punch (not shown) is utilized to; drive the lock-' ing members" downwardly into the recesses ll.

' This operation forces the tapered pins 18 upward 1y within the openings I and spread said openings, thereby causing the locking members to spread into snug engagement with the walls of the recesses Ii. In this manner the locking members are securelypositioned in the face of the casting so as to protect said casting from subsequent damage due to the stresses placed upon the latter. The locking members are preferably formed of a material capable of withstanding high tensile stresses so that said members may absorb any stress which may be placed upon the fractured member. Obviously, the lugs l4 lock the members l3 to the member Iii so that there can be no slippage of. the members [3 within the member ill. Although such a structure is not shown in the drawing, .it is to be noted that the recesses ll may be formed deep enough in the fractured member so as to receive more than one of the locking members l3. In such an instance, each individual locking member would be hammered into position with a punch before the next succeeding member is placed in position in the recess. The locking members are stacked, one upon the other, within the recess in this manner until the recess is full of said members.

A modification, or second form, of the invention is shown in Figures 3, 4 and 5 of the drawing. This modification is very similar to the first form of. the invention, described hereinbefore, and is placed or installed'in the fractured member in the same manner. The locking member utilized in the second form of the invention is an elongate bar 20 having semi-circular recesses 2! formed along each side thereof. The recess 22 in which the bar 20 is positioned will be of such a configuration as to conform to the shape of said bar. An elongate groove 23 is formed longitudinally of the bar 20 and extends throughout the length of said bar. The groove 23 is substantially V-shaped in cross-section, having th V inverted so as to have its apex extending upwardly. An elongate V-shaped wedge 24 fits. within the groove 23 so as to extend a short distance below the under side of the bar 20. The wedge 24 functions in a manner similar to the pins 16 of the first form of the invention in that it causes the bar 20 to spread into snug I engagement with the walls of the recess 22 when the bar is forced into position within said recess. Obviously, the groove 23 and the wedge 24 could be replaced by a plurality oftapered openings serve to spread or expand the locking memberv into snug engagement with the walls of the recess in which the member is mounted, and could be utilized with any suitable or desirable shape of locking member.

A further modification of the invention is shown in Figures 6, 7 and 8 of the drawing. This third form of the invention is particularly adaptable in instances wherein it is desired to mount a locking member upon a corner of a casting or fractured member. In this form of the invention a locking member 30 is employed, said member being provided with depending lugs'il. The lugs 3| may beof any suitable cross-sectional size and shape, and may be spaced from one another 1 in any desirable manner. The top side of the member 30 is formed so as to conform with the shape of the article being repaired when the locking member is in position within said article. In the particular installation shown in the drawing (Figures 4, 5 and 6) the locking member is formed with an inverted V-shaped top surface.

A tapered opening 32 extends axially of each of the invention. A suitable recess 34 is cut in thelocked in position within the recess.

All of the three forms of the invention which have been shown in the drawing, and which have been described in detail hereinabove, have several attributes in common with one another. The locking members are provided with lugs or recesses which look said members to the casting or article being repaired. The locking members are expanded into snug engagement with their respective recesses by means of wedgemembers, said wedge members being elongate wedges or tapered pins. With the locking members in such a position, the fracture or crack being repaired is closed and held closed; or, in any event, is prevented from becoming larger. The locking members absorb the tensile and compressive stresses'to which the casting is subjected at the damaged location, and prevent said stresses from inflicting further damage upon the casting. As pointed out hereinbefore, the locking members may be installed at a point in a casting where excessive stresses are known to occur. In the latter instance, the locks are preferably installed before the casting is broken or fractured, and serve to strengthen the casting and prevent such breaks or fractures.

What I claim and desire to secure by Letters Patent is: r

1. The combination with a casting of a reinforcing member including, an elongate integral element having its longitudinal axis disposed parallel to the surface of the casting and within a recess formed in said casting, and a wedge member having its base portion bearing against the bottom of the recess adapted to expand the element into snug engagement with the walls of said recess. 1

2. In combination with a casting, a reinforcing member adapted to be inserted at a point of stress including, an elongate integral element positioned within a recess formed in the casting with its longitudinal axis parallel the surface of saidcasting, and a pluralityof wedge members having their base portions bearing against the bottom of the recess adapted to expand the element into snug engagement with the walls of said recess.

3. The combination with a casting of a reinforcing member including, an elongate integral element disposed within a recess formed in the surface of the casting, the element having a plu-v rality 'of openings formed therein, and a plurality of tapered members engaging within the openings with their base portions bearing against the bottom of the recess and adapted to expand said element into snug engagement with the walls of said recess.

5. The combination with a casing-of a reinforcing member including, an elongate integral element disposed within a recessformed in the casting with its longitudinal axis parallel to the surface of the casting, the element having a groove formed in its lower surface, and a wedge member engaging within the groove with its base portion bearing against the bottom of the recess and adapted to expand said element into snug engagement with the walls of said recess.

6. The combination with a' casting of a rein- 7. The combination with acasting of a reinforcing member including, an elongate integral element disposed within a recess formedinthe casting with its longitudinal axis parallel to the surface of the casting, the recess having depressions formed in the walls thereof, the element having projections complementary to and engagtherein, and tapered pins engaging within the openings with their base portions bearing against the bottom of the recess and adapted to expand the element and its projections into snug engagement with the walls of said recess and the depressions thereof.

8. The combination with a casting of a reinforcing member including, an elongate integral element disposed within a recess formed in the casting with its longitudinal axis parallel to the surface of the casting, the recess having-depressions formed in' the walls thereof, the element having projections complementary to and engaging within the depressions ofsaid recess, said element having a V-shaped groove'formed in its lower surface, and a wedge member engaging within the groove with its base portion bearing against the bottom of the recess and adapted to expand the element and its projections into snug engagement with the walls of said recess and the depressions thereof.

9. The combination with a casting of a reinforcing member inciuding, an elongate integral element disposed within a recess formed in the casting with its longitudinal axis parallel to the surface of the casting, the recess having depressions formed in the walls thereof, the element having laterally-extending lugs complementary to and engaging within the depressions of said recess, and a wedge member having its base portion bearing against the bottom of the recess adapted to expand said element and its lugs into snug engagement with the walls of said recess and the depressions thereof.

10. The combination with a casting of a reinforcing member including, an elongate integral element disposed within a recess formed in the casting with its longitudinal axis parallel to the surface of the casting, the recess having depressions formed in the walls thereof, the element having laterally-extending lugs complementary to and engaging within the depressions of said recess, said element having a plurality of openings formed in the lower surface thereof, and a r wedge member engaging within each opening with its base portion bearing against the bottom of the recess and adapted to expand said element and its lugs into snug engagement with the walls e of said recess and the depressions thereof.

LAWRENCE B. sco'rr. 

